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Components
C
Key Exchange Method
Name
static Elliptic-curve Diffie–Hellman (ECDH)
Security
Static Elliptic-curve Diffie–Hellman[521][522] key exchange is a variant of the Elliptic-curve Diffie–Hellman[490][491] key exchange protocol using elliptic-curve cryptography[259][260][261][262]. It has no forward secrecy[135][136][137][138], and does not protect past sessions against future compromises. If long-term secret keys or passwords are compromised, encrypted communications and sessions recorded in the past can be retrieved and decrypted. Leading client applications do not use this algorithm. Unless your application or requirements specifically call for their use, it is generally safer to avoid cipher suites that are not adopted and supported by a critical mass of the industry.
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server or replace the cipher suite with it's Ephemeral Diffie-Hellman[142][143][144][145] version.
F
Authentication Method
Name
anon
Security
Lack of authentication is combined with anonymous key exchange[25][26], identity of server cannot be proved, so connection is open for a man-in-the-middle attack[414].
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.
F
Encryption Type
Name
NULL
Security
Encryption algorithm is a null encryption[568][569] that cannot provide confidentiality[198][199][200], so connection is available or disclosed to unauthorized individuals, entities, or processes.
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.
